Polymer Technology problems
- 1. In a cross linked polymer, the monomeric units are linked together to constitute a three dimensional network. Which of the following is a cross-linked polymer?
Options- A. Bakelite (phenol formaldehyde)
- B. Polyester
- C. Polythene
- D. Nylon-6 Discuss
Correct Answer: Bakelite (phenol formaldehyde)
- 2. Starting material for the production of SBR is
Options- A. ethyl alcohol
- B. ethylene
- C. both (a) & (b)
- D. neither (a) nor (b) Discuss
Correct Answer: both (a) & (b)
- 3. Which of the following polymers belong to the class of formaldehyde resin?
Options- A. Melamine resins
- B. Teflon
- C. Dacron
- D. None of these Discuss
Correct Answer: Melamine resins
- 4. Vinyl flooring is done using __________ sheets.
Options- A. polypropylene
- B. PVC
- C. polythene
- D. polyvinyl acetate Discuss
Correct Answer: PVC
- 5. Density of high density polythene is about __________ gm/c.c.
Options- A. 1.18
- B. 1.05
- C. 0.95
- D. 0.99 Discuss
Correct Answer: 0.95
- 6. Buna-S is a __________ material.
Options- A. fibrous
- B. plastic
- C. resinous
- D. rubbery Discuss
Correct Answer: rubbery
- 7. The synthetic fibres produced from __________ are known as rayon.
Options- A. lignin
- B. cellulose
- C. polyamides
- D. ethylene glycol Discuss
Correct Answer: cellulose
- 8. Out of all the elastomers, natural rubber has the longest elongation range & flexibility of the order of __________ percent.
Options- A. 1-1000
- B. 1000-1500
- C. 1500-2000
- D. 2000-2500 Discuss
Correct Answer: 1-1000
- 9. Which of the following is a copolymer?
Options- A. PVC
- B. Bakelite
- C. Polythene
- D. Teflon Discuss
Correct Answer: Bakelite
- 10. Buna-S is also known as
Options- A. teflon
- B. PTFE
- C. SBR
- D. polycrylates Discuss
Correct Answer: SBR
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